Actions
All four quadriceps are powerful extensors of the knee joint. They are crucial in walking, running, jumping and squatting. Because rectus femoris attaches to the ilium, it is also a flexor of the hip. This action is also crucial to walking or running as it swings the leg forward into the ensuing step. The quadriceps, specifically the vastus medialis, plays the important role of stabilizing the patella and the knee joint during gait.
Read more about this topic: Quadriceps Femoris Muscle
Famous quotes containing the word actions:
“There is a Book
By seraphs writ with beams of heavenly light,
On which the eyes of God not rarely look,
A chronicle of actions just and bright—
There all thy deeds, my faithful Mary, shine;
And since thou own’st that praise, I spare thee mine.”
—William Cowper (1731–1800)
“To be told that our child’s behavior is “normal” offers little solace when our feelings are badly hurt, or when we worry that his actions are harmful at the moment or may be injurious to his future. It does not help me as a parent nor lessen my worries when my child drives carelessly, even dangerously, if I am told that this is “normal” behavior for children of his age. I’d much prefer him to deviate from the norm and be a cautious driver!”
—Bruno Bettelheim (20th century)
“One will seldom go wrong in attributing extreme actions to vanity, moderate ones to habit, and petty ones to fear.”
—Friedrich Nietzsche (1844–1900)